Oil-burning device



May 28, 1929.

Filed April 10, 1924 L VA A. V.YPICKERING 1,714,569

OIL BURNING DEVICE 3 Sheets-$heet l in e/zz ar May 28, 1929.

A. V. PICKERING OIL BURNING DEVICE Filed April 10, 1924 3 Sheets-Sheet 2 May 28, 1929. v HCKERlNG 1,714,569

I OIL BURNING DEVICE Filed April 10, 1924 3 Sheets-Sheet 5 Patented May 28, 1929..

UNHTED sTeTs ALBERT V. PICKERI NGQOF WEST TOWNSEND, MASSACHUSETTS, ASSIGNOB TO TOWN- SEND MANUFACTURING CORPORATION, OF WEST TOWNSEND, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

OIL-BURNING DEVICE.

Application filed April 10, 1924. Serial No 705,677.

This invention relates to an oil burning device for producing heat in general, but more particularly for use under a boiler or other furnace for house heating and also for larger plants.

The principal objects of the invention are horizontal circular groove 19' on its upper surface. 1 This supports an adjusting collar 20 in the form shown in Fig. 6. Several of these collars are provided of diiferent heights. Each one has a circular lowerend to provide for burning efiiciently standard furnace oils or light oils testing around 40 Baum; to provide a construction entirely enclosed both outside and inside'the furnace so that there will be no exposed pipes; to provide an improved down draft combustion chamber having a conveniently arranged slit for the escape of the products of combustion; and to provide a combustion chamber which will be capable of being mounted at different elevations in a very convenient manner to be adapted for use on different furnaces without reconstruction. The invention also involves improvements in details of construction and combinations of parts as will appear.

Reference is to be had to the accompanying drawings in which Fig. l is a side elevation of a plant constructed in accordance with this invention and with the casing shown in section;

Fig. 2 is a plan of the same;

Fig. 3 is a View similar to Fig. 6 showing a burner for domestic use;

Fig. 4 is a transverse sectional view on the line 4-4 of Fig. 3;

Fig. 5 is a side view of the form of burner nozzle shown in Fig. 3;

Fig. 6 is a side view partly in central section of the combustion chamber in the form for use in large plants;

Fig. 7 is a plan of the same partly broken away to show interior construction;

Fig. 8 is an enlarged side view'of the burner nozzle; and a Fig. 9 is a sectional view on the line 99 of Fig. 8. I

I have shown the invention in a form in which a motor 10 is employed to operate a blower 11 which discharges into a conduit 12 formed in thebottom of a casing 13 to conduct the air into another conduit 14 which passes through an opening 15, which may be the draft or ash door of the furnace l6, and is supported inside by a base 17. This conduit 14 passes into the center of the furnace and has an upwardly extending.

which fits in the'groove 19 and is supported thereon and the collar 20 is provided with another groove 19 in the topilike the one below in which is placed the'lower edge 2l of the combustion chamber casing 22. The casing 22 is formed with two air condu1ts'28 extending outwardly in opposite directions for conducting the air upwardly from the conduit 14. This casing is pro vided with a cover 24 which really constitutes the top of the casing and this'has passages 25 which register with the conduits 23 and conduct the air around a pair of open air passages 26 and down to the center of the whole casing where they converge and terminate above the burner. These conduits supply the oxygen for combustion down through the center above the burner. The

' products ofcombustion can issue from the combustion chamber 28 surrounding the burner through two opposite narrow slits29 formed by recesses in the botto'm'of the site sides ofthecasing. These slits should 7 be from 1/4 to 11/64 wide. Thecombustlon chamber 28 is formed over a concave plate 30 Which. is located under the burner to collect the oil in case'the flame is extina hollow boss on the bottom ofthe plate 30.

Into the interior of this hollow boss extends the tube 32 which has a conical head 33 above the main body of the burner. This head 33 is-closed entirely at the top and two slots 34 are sawed into it. horizontal and in the same plane and exactly opposite each other and they extend in far enough to communicate with a longitudinal passage 35 down through the center .of the These slots are tion. of the air from above centrally on the conicalburner. The products of combustion issue from the slits 29 and has a purplish tint. I v J In Figs. 8, i and 5 I have shown'the invention arranged for use in a domestic size heater. In this case the lower plate 80 has a series of circular concentric corrugations 81 around the burner, each one depressed a little below the one within it. Also the roof of the combustion chamber, instead of being flat or annularly concave, is convex as shown at 82. This gives much less space for the incoming .air and modifies the delivery of the flanie to the slits 29. These slits are formed above by a conical outer surface 82 on which soot cannot lodge.

The burner itself has a short cylindrical top 83 instead of the conical one 33. Its side slots 3% are located down near the plate '30 instead of being spaced materially above it. The passage of the fuel through the slots 34 converts the liquid fuel into a fine mist or spray and it burns with a white flame which is practical for ,a small or domestic size heater.

V It will be noticed that the concave plate 30 is provided with a waste oil discharge passage 36' which communicates with a waste pipe 37 which comes down through the conduit 14 with the supply pipe 31. The two pipes 31 and 37 are enclosed in the air conduit 14 and'casing 13 so that there is no exposed piping, andthey are cooled by the air.

The parts for supplying the fuel are lo-.

cated and enclosed in the casing 13 and protected from dirt and accidental displacement. The casing is provided with a cover 67 which itself is perforated and provided with another cover 68 for use in inspecting the parts. The conduit 14 is also provided with a cover 69 for a similar purpose. It is provided with a pair of integral hooks 7O concave on the bottom. The top of the con 'duit 14 is provided with a pair of integral lugs 71 concave on top .and'so related to the hooks that a loose pivot shaft '72 can be laid on them to receive the hooks 70 and pivotally connect the cover 69 with the top of the conduit without any boring or other machining. v I

IVith this construction, the liquid fuel can be fed by gravity or by a pump and is contii'lmiuisly fed to the pipe 81. The feed of the current of air accomplished through an entirely clo:-;ed construction with no pipes exposed. and the air is distributed evenly around the plate 30 so as to cool the latter and supply oxygen for combustion directly down over the burner to reduce noise'and roaring. The products of combustion issue through the slit 29 practically all around the burner and at a horizontal level above it. The combustion chamber can be adjusted by putting in collars 20 having any desired length, T he door 18 is readilyaccQssible from the fire door of the furnace for inspection, cleaning and repairs. When for any reason the flame is extinguished and the oil continues toflow it will soon drain out through the pipe 37.

Although I have illustrated and described only a single form of the invention, I am aware of the fact that modifications can be made therein by any personskilled in the art without departing from the scope of the invention as expressed in the claims.

Therefore I do not Wish to be limitedto all the details of construction herein shown and describechbut what I do claim is c 1. In a liquid fuel burning apparatus, the combination with aconducting pipe for the liquid fuel, a burner connected therewith, and a concave plate under the burner, 'of a combustion chamber conduits extending from below the plate up around its edges and back down to the center above the burner, and means for'supplying air to said conduits, the combustion chamber having thin horizontal slits'on opposite sides ex: tending from one conduit tothe other at a level just above the burner for the escape of products of combustion. V

2. A liquid fuel burning apparatus com prising a combustion chamber having thin slits opening outwardly therefrom, and a burner at the center of the combustion chamber having a conical end with slots in the surface of the'cone for the discharge of liquid fuel, the space between the slots and slits being unobstructed, the slits in the walls of the combustion chamber being very narrow, extending substantially all the way around the combustion chamber, of the same width at all points, and constituting the sole means for the discharge of the products of combustion, which they discharge in a thin sheet. i i

3. In a liquid fuel burner, th'e'combination with a conducting pipe for the fuel, a burner having oppositely extending narrow slots in the same plane at the sides thereof, and a concave plate under the burner, of a casing and a cover over the burner and plate and having conduits each'extending into the casing and cover from one side of the plate around its edges and back to the center above the burner and centrally downwardly in line therewith, the casing having thin horizontal slits on each opposite side extending nearly half Way around it and about of an inch high in a plane slightly above the burner for the escape of the prodsubstantially flat top and provided with conduits extending along the casing at its sides, a plate within the casing, a burner at the center of sa1d casing located on said vand readily detachable therefrom, said cover and casing having slits between them of constant width opening at their peripheries for the discharge of the products of combustion and conduits communicating with the first-named conduits and curving upwardly therefrom and then downwardly toward the center of the casing and terminating just above said burner to supply air to the burner'for supporting combustion.

In testimony whereof I have hereunto atfixed my signature,

- ALBERT V. PICKERING. 

